0336 Top Sellers Catalog Edition 1

Building Codes

505.7.1 Circular Section: Handrail gripping surfaces with a circular cross section shall have an outside diameter of 1 1/ 4 inches (32mm) minimum and 2 inches (51mm) maximum. 505.7.2 Non-Circular Cross Sections: Handrail gripping surfaces with a non-circular cross section shall have a perimeter dimension of 4 inches (100mm) minimumand 6 1/ 4 inches (160mm) maximum, and a cross-section dimension of 2 1/ 4 inches (57 mm) maximum.

4” - 6.25” Perimeter

Non-Circular Cross Section

100-160

2.25” max 57

2.25” max 57

(a)

(b)

Handrail Clearance While the 1991 ADAAG stated that the distance between the wall and handrail had to be 11 /2", all subsequently published model codes – including the 2010 ADASAD – now state this to be a minimum requirement. Note: NFPA and OSHA require a 2 1/4" minimum clearance. 505.5 Clearance. Clearance between handrail gripping surfaces and adjacent surfaces shall be 1 1/ 2 inches (38 mm) minimum. Railing Height Top of gripping surfaces of handrails shall be 34" minimum and 38" maximum vertically above stair nosings and ramp surfaces. Handrails shall be a consistent height above stair nosings and ramp surfaces. ADAAG Advisory: The requirements for stair and ramp handrails in this document are for adults. When children are the principle users in a building or facility (e.g., elementary schools), a second set of handrails at an appropriate height can assist them and aid in preventing accidents. A maximum height of 28 inches (710 mm) measured to the top of the gripping surface from the ramp surface or stair nosing is recommended for handrails designed for children. Sufficient vertical clearance between upper and lower handrails, 9 inches (230 mm) minimum, should be provided to help prevent entrapment. For More Information For current information on accessibility issues, refer to our website.

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